User manual STEVAL-ILL055V1: 11 W offline LED drive with high power factor based on HVLED815PF (EU input range) Introduction The purpose of this document is to provide detailed information for the STEVAL-ILL055V1 offline LED evaluation board in order to aid the user in its use. The application implemented in the board is an isolated SMPS, designed in high power factor flyback topology. It generates a 640 ma nominal output current capable of delivering up to 11 W output power, providing a cost-effective and space-saving solution. This STEVAL-ILL055V1 is based on STMicroelectronics HVLED815PF, a monolithic offline LED driver with primary-sensing and integrating an 800 V avalanche rugged power MOSFET and PWM controller in one package. This document contains a basic technical description of the evaluation board (schematic diagram, transformer specification, PCB details and bill of material) as well as the most significant parameter measurements (load regulation, efficiency, standby behavior, EMI and thermal behavior data). Figure 1. STEVAL-ILL055V1 June 2014 DocID025615 Rev 1 1/12 www.st.com
Contents UM1702 Contents 1 Main characteristics......................................... 3 2 Schematic diagram.......................................... 4 3 Bill of materials (BOM)....................................... 5 4 Transformer specification.................................... 7 5 Measurements.............................................. 8 6 Revision history........................................... 11 2/12 DocID025615 Rev 1
Main characteristics 1 Main characteristics The main characteristics of the offline LED driver are listed below: Input: Voltage: 185 264 Vac Frequency: 45 55 Hz Output: Current: 640 ma Voltage: 6-LED module (blue or white) a) Power factor >0.9 Efficiency 84% PCB type and size: FR4 Double layer Copper thickness: 35 µm LED driver size: 17 x 55 mm Board size: 34 x 88 mm Isolation Isolated 2 kv / 4 mm isolation gap EMI In accordance with EN55022 Class B DocID025615 Rev 1 3/12 12
L Schematic diagram UM1702 2 Schematic diagram Figure 2. STEVAL-ILL055V1 circuit schematic C10 BD1 L1 C1 68nF 3.3mH C2 100nF R17 330k R18 330k 9 BLEEDCS BLEEDG 10 NA 11 NA 12 NC 13 DRAIN HVL ED815PF 14 DRAIN 15 DRAIN 16 DRAIN COMP DMG ILED GND VCC CS SOURCE 8 7 6 5 4 3 2 1 U1 R9 10R D2 1N4148 C3 1nF D1 R1 120k R8 47k 2.2nF T1 D3 STP S3150UF C12 25V 470uF C13 50V 10uF C14 50V 10uF + LED R12 150k - LED P2 2 1 R15 1W 10R 2 1 N P1 GND R19 3k C5 1uF C21 68nF D4 1N4148 R7 12k C6 470nF C7 1nF R2 3R6 R3 1R5 C4 10uF C15 22uF C8 100nF R5 5k1 GSPG02122013DI1045 4/12 DocID025615 Rev 1
Bill of materials (BOM) 3 Bill of materials (BOM) Table 1. BOM Ref Value Package Manufacturer Part number BD1 600V 0.8A Mini DIP DIODES Inc. HD06-T C1 47nF X2 DIP 5x11x13 Epcos B32921C3683M C2 100nF X2 DIP 4x9x13 Epcos B32921C3104M C3 1nF 630V- X7R SMD 1206 Epcos C3216X7R2J102K C4 10uF -25V - X5R SMD 0805 AVX 08053D106KAT2A C5 1uF - 10V- X7R SMD 0603 AVX 0603ZD105KAT2A C6 470nF SMD 0603 Multicomp MCCA001174 C7 1nF SMD 0603 Multicomp MCCA000224 C8 100nF-25V SMD 0603 Multicomp MCCA000255 C10 2.2F 250V SMD 1808 Murata GA355DR7GC222KY02 C12 470uF - 25V SMD FK-G Panasonic EEEFK1E471P C13 10uF -50V X5R SMD 1206 Epcos C3216X5R1H106K C14 10uF -50V X5R SMD 1206 Epcos C3216X5R1H106K C15 22uF - 25V - X5R SMD 0805 Murata GRM21BR61E226ME44L C21 68nF 10V SMD 0603 AVX 06035C683KAT2A D1 0.5A- 600V SMD M-FLAT TAIWAN SEM. RSFJL D2 1N4148 SOD-323 Vishay 1N4148WS-V-GS08 D3 3A 150V SMB FLAT ST STPS3150UF D4 1N4148 SOD-323 Vishay 1N4148WS-V-GS08 L1 3.3mH Coilcraft LPS6235-335ML R1 120k SMD 1206 Panasonic ERJP08F1203V R2 3R6 1% SMD 0805 R3 1R5 1% SMD 1206 R5 5.1k 1% SMD 0805 Multicomp MC 0.1W 0805 1% 5K1 R16 1k -1W SMD 2512 R7 12k SMD 0603 Multicomp MC 0.063W 0603 1% 12K R8 47k 1% SMD 0805 Multicomp MC 0.1W 0805 1% 47K R9 10R SMD 0805 Multicomp MC 0.1W 0805 1% 10R R12 150k SMD 0603 Multicomp MC 0.063W 0603 1% 150K R15 10 Ohm 2W SMD 2515 Vishay WSC251510R00FEA R17 330k 1% SMD1206 Panasonic ERJP08F3303V DocID025615 Rev 1 5/12 12
Bill of materials (BOM) UM1702 Table 1. BOM (continued) Ref Value Package Manufacturer Part number R18 330k 1% SMD1206 Panasonic ERJP08F3303V R19 3k6 1% SMD 0603 Panasonic ERJ3EKF3601V T1 EP13 SMD 10 pin Coilcraft PA6284-AL U1 HVLED815PF SO-16 ST 6/12 DocID025615 Rev 1
Transformer specification 4 Transformer specification The transformer was developed in collaboration with the company Coilcraft, and is available through order number PA6284-AL. Core shape: EP13 Core material: N87 SMD bobbin, 8 pins Primary inductance: 1.4 mh Table 2. Transformer specification Layer Name No. turns Start pin Stop pin Wire dia. No. of layers 1 Primary 125 5 3 0.16 4 2 Secondary 17 10 6 2 x 0.2 2 3 Auxiliary 18 2 1 0.16 2 Figure 3. Windings of the transformer Figure 4. Bottom view of the transformer 5 6 Primary Secondary 3 2 10 Auxiliary 1 DocID025615 Rev 1 7/12 12
Measurements UM1702 5 Measurements All measurements were conducted on the prototype board. The load was a 6-LED, 640 ma module. 90 Figure 5. Efficiency 85 Eff [%] 80 75 70 170 190 210 230 250 270 Uni [Vac] Figure 6. Power factor 100 98 GSPG02122013DI1530 PF [%] 96 94 92 90 170 190 210 230 250 270 Uin [Vac] GSPG02122013DI1535 8/12 DocID025615 Rev 1
Measurements Figure 7. Output current 660 640 Iout [ma] 620 600 580 560 170 190 210 230 250 270 Uni [Vac] Figure 8. EMI measurement quasi peak GSPG02122013DI1540 Ref 115 dbμv EmiQP Log 10 db/ Atten 20 db * Meas Uncal V1 S2 S3 FC AA Start 9 khz Res BW 9 khz VBW 30 khz Stop 30 MHz Sweep 4 ks (2121 pts) Figure 9. EMI measurement average Ref 80 dbμv EmiAv Log 10 db/ Atten 5 db Meas Uncal S1 V2 S3 FC AA Start 150 khz Res BW 9 khz VBW 30 khz Stop 30 MHz Sweep 4 ks (2115 pts) DocID025615 Rev 1 9/12 12
Measurements UM1702 Figure 10. Thermal measurement top side Figure 11. Thermal measurement bottom side 10/12 DocID025615 Rev 1
Revision history 6 Revision history Table 3. Document revision history Date Revision Changes 04-Jun-2014 1 Initial release. DocID025615 Rev 1 11/12 12
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